diff --git a/2019/CMakeLists.txt b/2019/CMakeLists.txt
index f09fe54..7492ad1 100644
--- a/2019/CMakeLists.txt
+++ b/2019/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.15)
+cmake_minimum_required(VERSION 3.12)
 
 project(aoc2019)